RTA 1963 21. C. melanotos 21 june Barrow, Alaska after which the C? follows & may repeat the above performance when they land again. At times - The guttural kursor - note well turn with a liquid note - which is given rapidly. Such as most so's been partly subvocal & apparently involved in the produced 1st sound. This gott, goot.... Note seem to be a modification of the aerial booming - (i.e perhaps the full actual living stroke is needed to fill air sacs & then to expel the air). The bubbly-gurgling note on the ground is given with very noticeable movement of the head throat region - both head & tail - (i.e forward component comp. hue - head moves from vertical to 45° forward - back ) - bill is open during these acts. Since the C? normally remains indifferent to these actions (have described above had a nest with 4 eggs) The occurs cannot arise where C? will move therewith to a & with a complete clutch), she keeps on feeding. When the C? gets too close & whatever, it gives a coel note from flight - it follows, giving the follower chime note the lines, to follows. Sometimes - when landing